SAP Document and Reporting Compliance, outbound invoicing option for Brazil didn't support proxy connections with authentication between the backend and external systems. We recently delivered a new feature to address this technical requirement.
Now you can configure optional proxy authentication for your company since you've defined the connection details to the SAP Business Technology Platform.
SAP Document and Reporting Compliance: Optional Proxy Configuration
To implement these changes, follow the instructions on SAP Note 3341605.
For a step-by-step guide on how to use the new proxy configuration, refer to the following SAP Help Portal page: